public class Test {
    public static void main(String[] args) {
        Solution s=new Solution();
        //System.out.println(s.cuttingRope(120));
       // s.myPow(2.0,2);
        int [] arr=new int[]{1,2,3,4};
        s.exchange(arr);
        System.out.println("aaaa");
    }
}
